A MONOGRAPH OF THE EXISTING CRINOIDS 75 



is somewhat flattened exteriorly; the segments have ^^"XKrto 

 distal outer angle may be somewhat produced. P 2 ™bles P,^ but * sbgi ' slater 

 and less stout The pinnules following decrease gradually in length to about P., * nici 

 fc 4 mm Ion' with 9 segments, all broader than long except the last two The genital 

 pirn ules n crease slowly in width from the base to the third segment, thence tapering 

 rthetip The second and third, or second- fourth segments being slightly broadened 

 The disS pinnules are more slender, 7 or 8 mm. long with 18 segments, all of winch are 

 about as long as broad and very sharply connate. 



The disk is moderately or well plated, and the ambulacra are well plated, bacculi 



&re tSf-I^ttrte^ns from the type locality the proximal distal, and lateral 

 horded oHhe elements of the iBr series and the lateral borders of the IIBr series may 

 b^ more ofll extensively irregularly tuberculate, this tuberculatum someUmes 

 to vmg the entire dorsal surface of the IBr, and some specimens show a ^ di^t 

 though low and narrow, middorsal line on the division series and on all the brachials 



° f ^^^l^Z^iPenssornetra aranea based upon a single specimen 

 from BocVs staUon 7a is as follows: The centrodorsal is a low cone 2 mm. in diameter 

 doTahy with a crtll cavity and small side cavities. The cirrus sockets are arranged 

 in 10 columns, one , ox : two , in «-W™. ^ ^ ^ ^^ 



segment f^e- f „„,„, bant , Si alnMst eoneealed. The IBr, are 



SSaXSJSSXT ^"tt n^aro -re , a >o, ^ 



of about 5 oblique museular art.eul.t.ons. segments. P. 



P, is 5 mm. Ions with 13 segments. I . is also 5 mm. lon„ „ 



is 3.5 mm long witT 8 or 9 segments P, is similar. P. - «£»**£& 

 nrents of these ptari. are rat tar nm.orm smoo h a g***^-. o( ,«, , lu , 



SSSr^-fi* n^eolrsoventrW. The distal pinnn,es .re M - 



